LUSAS help?

miss no stars

So I've created myself a cross section that I need, well the shape of it at least (it's a combined beam and slab, that kinda T shape with the long flanges). Anyway, I need to reinforce it but can't find anything on how to do that.

Basically it's part of a frame and the slab has a UDL on it and the beam carries the slab, supported on concrete columns. Unfortunately I've got no idea how to put reinforcement for the slab and for the beam in the correct locations.

Please help

paraicr

Most good concrete design books would have a typical layout of reinforcement for a T-beam, even do a google search and you can see the general idea for reinforcing such sections.

Main tensile reinforcement goes below the NA at the lowest possible level, dictated by the required cover, bar diameter and secondary reinforcement. Size and quantity of bars depend on the resistance you require.
Shear links and nominal bars also need to be designed.

Is there any reason why you need to model the reinforcement in Lusas?

miss no stars

Ah sorry, didn't quite make myself clear. The location of reinforcement is not the issue, it's making LUSAS let me model it that's my current problem Like I've defined the cross section shape but when I try to use it as the cross section for the beam I end up with it only in one location and unable to put reinforcement in. Then I modelled it as a rectangular beam on columns with a thickness, and a volume for the slab on top and the analysis wouldn't run. Yipee.

Nevermind though, I gave up for now

Thanks for answering though!

Gileadi

I've some experience wiht using lusas, is this for work or college?

miss no stars

It's for college. Had to already submit the work though but thanks for the replies.

huibee1224

1. Hi, i am a postgraduate student using Lusas to model my structural form of tall building. Is that anyone know

1. How to match the local axis of an inclined member (like a branch of a tree) to its global axis instead of method of changing some parameters under attribute - local coordinate?

If i have 1000 inclined members in a model, Is there any shortcut (just click one icon) to change the major/minor axis of cross section of an inclined member to follow / parallel to global axis?

2. How to model rigid diaphragm for each floor layer in tall building? is there any other settings of rigidity / flexibility adjustment for each "rigid" diaphragm that we set in LUSAS?

Thank you
Tq

huibee1224

1. Hi, i am a postgraduate student using Lusas to model my structural form of tall building. Is that anyone know

1. How to match the local axis of an inclined member (like a branch of a tree) to its global axis instead of method of changing some parameters under attribute - local coordinate?

If i have 1000 inclined members in a model, Is there any shortcut (just click one icon) to change the major/minor axis of cross section of an inclined member to follow / parallel to global axis?

2. How to model rigid diaphragm for each floor layer in tall building? is there any other settings of rigidity / flexibility adjustment for each "rigid" diaphragm that we set in LUSAS?

Thank you
Tq

abigcom

hi, pls i need to model a beam for my project, i can not put in reinforcement, can you help me with how i am going to fix reinforcement using lusas

izziyantie

Hai everyone, nice to find out about LUSAS forum. Looks that this was years a ago discussion. May I know that anyone here ever done for modelling using LUSAS for GFRP bars reinforcing concrete beam. I am a postgrad student. Really hope for reply. Thanks